Dave, Re: My understanding is that using the security options in 8.5 requires a MS Domain, with a domain controller. You are correct. Re: Does the domain controller communicate over the mesh, or do they use the secondary ethernet ports of the AW/WPs? The only officially supported position is for the Domain Controllers to be: 1) On the MESH (IOM restriction) 2) Not dual homed (MS restriction) Of course, other configurations may work, but we haven't tested or documented them at this point. We do have a Security group that can assist with special situations. Re: Also would it be allowable to run any other software on the domain controller since this box is doing almost nothing (processing & network wise). The answer is no. MS says nothing on a DC. Of course, they are thinking about DCs with 10,000s of users, but never the less we do not have permission to load anything else on the box. Re: This would be a great place to store engineering drawings, or other items that might need to be accessed by engineers on an AW without having access to the larger mill network. True, but not available. Regards, Alex Johnson Invensys Operations Management 10900 Equity Drive Houston, TX 77041 +1 713 329 8472 (desk) +1 713 329 1600 (operator) +1 713 329 1944 (SSC Fax) +1 713 329 1700 (Central Fax) alex.johnson@xxxxxxxxxxxx (current) alex.johnson@xxxxxxxxxxxxxxxx (good until September 2010) Attend OpsManage'10 Real Collaboration. Real-Time Results. Click Here to learn more about these events and to register. *** Confidentiality Notice: This e-mail, including any associated or attached files, is intended solely for the individual or entity to which it is addressed. This e-mail is confidential and may well also be legally privileged. If you have received it in error, you are on notice of its status. Please notify the sender immediately by reply e-mail and then delete this message from your system. Please do not copy it or use it for any purposes, or disclose its contents to any other person. This email comes from a division of the Invensys Group, owned by Invensys plc, which is a company registered in England and Wales with its registered office at Portland House, Bressenden Place, London, SW1E 5BF (Registered number 166023). For a list of European legal entities within the Invensys Group, please go to http://www.invensys.com/legal/default.asp?top_nav_id=77&nav_id=80&prev_id=77. You may contact Invensys plc on +44 (0)20 7821 3848 or e-mail inet.hqhelpdesk@xxxxxxxxxxxxx This e-mail and any attachments thereto may be subject to the terms of any agreements between Invensys (and/or its subsidiaries and affiliates) and the recipient (and/or its subsidiaries and affiliates). _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave